Original Description of Orthaulax by Gabb, 1873 cited from Cooke, 1922:
- "Shell rounded-fusiform, canal moderate, straight and regularly tapering; adult shell enveloped over the whole spire by the extension of the inner lip; posterior canal fissure-like, formed by the continued edge of the outer lip and running directly to the apex. Outer lip apparently sharp and simple; anterior notch oblique and broad."
Type species of Orthaulax is Orthaulax inornatus Gabb, 1873
Orthaulax species are
- Orthaulax aguadillensis Maury, 1920
- Orthaulax caepa Cooke, 1922
- Orthaulax carolinae Maury, 1912
- Orthaulax conoides Woodring, 1923
- Orthaulax dainellii Savazzi, 1989
- Orthaulax gabbi Dall, 1890
- Orthaulax hernandoensis Mansfield, 1937
- Orthaulax inornatus Gabb, 1873
- Orthaulax pugnax (Heilprin, 1887)
- Orthaulax seaforthensis Trechmann, 1941
- Orthaulax sp
Further Orthaulax species might be
not belonging to Orthaulax
History and Synonymy
Wagneria Heilprin, 1887
Original Description of the genus Rostellaria (Veatchia) by Maury, 1912, p. 90:
- "A single fragment of a shell was found at Soldado Rock, Bed No. 2, which in general form resembles the subgenus Orthaulax Gabb. It differs, however, from the latter in a very curious characteristic which marks it as altogether sui generis. This differentiating character is the curving into loops of the posterior canal, which is adherent to the upper portion of the body whorl. In this respect the shell approaches the subgenus Calyptraphorus Conrad, in which the posterior canal makes one semicircular curve over the dorsal side of the body whorl. Thus the subgenus Veatchia lies in an intermediate position between the subgenera Orthaulax and Calyptraphorus.
- Type species: Rostellaria (Veatchia) carolinae Maury, 1912
- Etymology: "The writer dedicates this new subgenus to Mr. Arthur C. Veatch, of Washington, D.C., in pleasant memory of our geological work in Venezuela."
Description of the genus Orthaulax by Woodring, 1923, p. 4:
- "Shell attaining a large size, fusiform, conical or ovate; cross section triangular or circular; early whorls bearing varices, entirely concealed in adult shells; after 7 to 10 volutions, outer lip extending to tip of spire and in each succeeding volution completely enveloping spire; space between spire and each enveloping whorl filled with callus; later whorls smooth, or sculptured with narrow spiral threads on and below the shoulder; aperture elliptical, gradually constricted posteriorly into a narrow channel ascending the spire; outer lip thin except at posterior end of aperture, expanded, bearing near the base a very shallow sinus; siphonal notch at base of aperture wide and very deep; anterior fasciole swollen; base of columella slender, curved backward, undercut by siphonal notch; columellar callus thickened at base of posterior channel, thinner over inner lip and extending to base of columella; base of body whorl of young shells sculptured with spiral sulci that widen toward the base."
Woodring, 1959, p. 190 on the genus Orthaulax:
- "Orthaulax is an endemic American genus found in the Caribbean region and its borders. It is recorded from Georgia, Alabama, Florida, Cuba, Jamaica, Haiti, Dominican Republic, Puerto Rico, Vieques, St. Croix, Anguilla, Antigua, Mexico, Guatemala, Canal Zone, Venezuela, and Brazil. Twelve species and subspecies have been described, but some of them are purely nominal. O. gabbi, the last species in southeastern United States, is the only species represented by a full suite of growth stages and is the only species well enough preserved to have an undamaged outer lip. The genus appears throughout its known maximum geographic range (except Brazil) during late Oligocene time and survived until the end of early Miocene. That is, it occurs in three faunal zones: one late Oligocene and two early Miocene. As suggested by Davies (1935, p. 266) the massive shell of Orthaulax strengthened by the thick parietal callus under the successively overlapping whorls, is reasonably interpreted as an adaptation to strongly surging water. Its wide distribution in the late Oligocene coincides with an equally wide development of coral reefs. It appears as suddenly as an invader and has no known immediate predecessors in the Caribbean region or elsewhere. Nevertheless it presumably arose from an Oostrombus like ancestor in the Caribbean region. A suitable facies for immediate ancestors has not yet been found in the lower Oligocene deposits of that region."
Bandel, 2007 places Orthaulax into the family Thersiteidae
- Bandel, 2007
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- Cooke, C. W. (1920). The stratigraphic significance of Orthaulax: Geol. Soc. America Bull, 31, 206.
- Cooke, 1922
- Cooke, C. W. (1935). Notes on the Vicksburg group. AAPG Bulletin, 19(8), 1162-1172.
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- Harzhauser, Piller & Steininger, 2002
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- Moscatelli, 1987
- Dilce F. Rossetti, Francisco H.R. Bezerra, José M.L. Dominguez, Late Oligocene–Miocene transgressions along the equatorial and eastern margins of Brazil, Earth-Science Reviews, Volume 123, August 2013, Pages 87-112.
- Savazzi, 1989
- Savazzi, 1991
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- C.T. Trechmann, 1941. Some observations on the geology of Antigua, West Indies. Geological Magazine, Vol. 78(2), pp. 113-124.
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- Wenz, 1938
- Woodring, 1923
- Woodring, 1959